==External Links==
* [http://ti99db.org/Cartridges_view.php?SelectedID=195 TI99DB: Cartridge Details: Laws of Arithmetic]* [http://www.ti99ers.org/timeline/cartl.htm TI99ers On-line User Group: Cartridges: LS]* [http://www.ti99ers.org/timeline/cartbytitle.html#L S TI-99ers On-line User Group: TI-99 Cartridge Listing]
[[Category:1983 Software]]
